Pinpoint Test E: LFC 27/DTC B1884 - Passenger Air Bag Deactivation (Pad) Warning Lamp Circuit Failure

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.

E1 CHECK FOR ON-DEMAND AND CONTINUOUS DTCs
WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.

WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.

NOTE: After diagnosing or repairing a supplemental restraint system (SRS), the restraint system diagnostic tools must be removed before operating the vehicle over the road.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- Enter the following diagnostic mode on the diagnostic tool: Retrieve/Record On-Demand DTCs.
- Enter the following diagnostic mode on the diagnostic tool: Retrieve/Record Continuous DTCs.
- Was DTC B1884 retrieved during the on-demand self test?
- Yes : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. GO to E2.
- No : This is an intermittent fault. The fault condition is not present at this time. GO to E6.
E2 CHECK THE PAD SWITCH WARNING LAMP VOLTAGE
- Key in OFF position.
- Deactivate the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION in this article.
- Disconnect: RCM C2041.
- Key in ON position.
- Measure the voltage between RCM C2041 pin 9, circuit 1113 (YE/LG), harness side and ground.
  
  Fig 1: Measuring Voltage Between RCM C2041 Pin 9 Circuit 1113 Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage between 9 and 16 volts?
- Yes : INSTALL and CONFIGURE a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) in this article. GO to E7.
- No : GO to E3.
E3 CHECK CIRCUIT 609 (OG/YE) FOR AN OPEN
- Key in OFF position.
- Disconnect: PAD Switch C2099.
- Measure the voltage between PAD switch C2099 pin 4, circuit 609 (OG/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between Pad Switch C2099 Pin 4 Circuit 609 Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to E4.
- No : REPAIR circuit 609 (OG/YE), GO to E7.
E4 CHECK CIRCUIT 1113 (YE/LG) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: PAD Switch C2099.
- Measure the resistance between RCM C2041 pin 9, circuit 1113 (YE/LG), harness side and ground.
  
  Fig 3: Measuring Resistance Between RCM C2041 Pin 9 Circuit 1113 Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to E5.
- No : REPAIR the circuit. GO to E7.
E5 CHECK CIRCUIT 1113 (YE/LG) FOR AN OPEN
- Measure the resistance between RCM C2041 pin 9, circuit 1113 (YE/LG), harness side and PAD switch C2099 pin 3, circuit 1113 (YE/LG), harness side.
  
  Fig 4: Measuring Resistance Between RCM C2041 Pin 9 Circuit 1113 Harness Side And Pad Switch C2099 Pin 3 Circuit 1113
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new PAD switch. REFER to PASSENGER AIR BAG DEACTIVATION (PAD) SWITCH in this article. GO to E7.
- No : REPAIR circuit 1113 (YE/LG). GO to E7.
E6 CHECK FOR AN INTERMITTENT FAULT
- Key in OFF position.
- Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test.
- Was DTC B1883 retrieved during the on-demand self test?
- Yes : This is a hard fault. The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. GO to E2.
- No : CHECK for causes of the intermittent fault on circuit 1113 (YE/LG). ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. GO to E7.
E7 CHECK FOR ADDITIONAL DTCs
- Refer to the continuous DTCs recorded during Step E1.
- Were any continuous DTCs retrieved during Step E1 ?
- Yes : Do not clear any DTCs until all DTCs have been resolved. GO to the RESTRAINTS CONTROL MODULE (RCM) DIAGNOSTIC TROUBLE CODE (DTC) PRIORITY TABLE in this article for pinpoint test direction.
- No : RECONNECT the system. If previously directed to deactivate the system, REACTIVATE the system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION in this article. REPOWER the system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING in this article. PROVE OUT the system. CLEAR all DTCs.